APA   Click to copy
Guthrie, S. J., Smiley, A. H., & Hocking, J. E. From Purity to Proposals: “Ring by Spring,” Purity Culture, and Drive to Marry in Christian Undergraduates.

Chicago/Turabian   Click to copy
Guthrie, Sophie J., Adam H. Smiley, and Jessica E. Hocking. “From Purity to Proposals: ‘Ring by Spring,’ Purity Culture, and Drive to Marry in Christian Undergraduates,” n.d.

MLA   Click to copy
Guthrie, Sophie J., et al. From Purity to Proposals: “Ring by Spring,” Purity Culture, and Drive to Marry in Christian Undergraduates.

@unpublished{sophie-a,
  title = {From Purity to Proposals: “Ring by Spring,” Purity Culture, and Drive to Marry in Christian Undergraduates},
  author = {Guthrie, Sophie J. and Smiley, Adam H. and Hocking, Jessica E.}
}